package com.hx.redis;
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import org.springframework.data.redis.core.RedisTemplate;
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import org.springframework.stereotype.Component;
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import javax.annotation.Resource;
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import java.util.Date;
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import java.util.concurrent.TimeUnit;
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/**
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* 文件处理工具
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*
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* @author wangrenhuang
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* @Date 2021-10-19
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*/
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@Component
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public class RedisUtil {
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/**
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* [redis]
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*/
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@Resource
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private RedisTemplate<String, Object> redisTemplate;
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/**
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* [判断key是否存在]
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*
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* @param key 键
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* @return true 存在 false不存在
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*/
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public boolean hasKey(String key) {
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try {
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return redisTemplate.hasKey(key);
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} catch (Exception e) {
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return false;
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}
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}
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/**
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* [普通缓存获取]
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*
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* @param key 键
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* @return 值
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*/
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public Object get(String key) {
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return key == null ? null : redisTemplate.opsForValue().get(key);
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}
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/**
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* [普通缓存删除]
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*
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* @param key 键
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* @return 值
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*/
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public boolean delete(String key) {
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try {
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Boolean aBoolean = redisTemplate.hasKey(key);
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return aBoolean == false ? true : redisTemplate.delete(key);
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} catch (Exception e) {
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return false;
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}
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}
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/**
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* [普通缓存放入]
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*
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* @param key 键
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* @param value 值
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* @return true成功 false失败
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*/
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public boolean set(String key, Object value) {
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try {
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redisTemplate.opsForValue().set(key, value);
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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/**
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* 普通缓存放入并设置时间
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*
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* @param key 键
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* @param value 值
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* @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
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* @return true成功 false 失败
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*/
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public boolean set(String key, Object value, long time) {
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try {
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if (time > 0) {
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redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
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} else {
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set(key, value);
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}
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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}
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/**
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* 26
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* 指定缓存失效时间
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* 27
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*
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* @param key 键
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* 28
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* @param time 时间(秒)
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* 29
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* @return 30
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*/
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public boolean expire(String key, long time) {
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try {
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if (time > 0) {
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redisTemplate.expire(key, time, TimeUnit.SECONDS);
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}
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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}
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}
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